At 10, Aug. 22 -- Leo season ends tonight, and the sign taking over gets six days to settle in before the sky interrupts it.

19 on Saturday evening Eastern time, which is 2:19 on Sunday morning UTC and 7:49 on Sunday morning in India, the Sun crosses out of Leo and into Virgo. The ingress itself is unremarkable. It happens once a year within a day of the same date, and it is close to the least dramatic thing the sky does. What makes this one worth marking is what it sets up. Six days later, on 28 August, the Moon slides almost entirely into the Earth's shadow, and it does so in Pisces, directly opposite the sign the Sun has just entered.

That is not a coincidence, and it is not mysticism. It is geometry, and it happens to be the cleares...